Q. (For writing a pruzbul) Can you take any three people who are frum, even if they do not know much about Torah and explain to them what is pruzbul and what you want?

A. Poskim disagree concerning what kind of Beis Din is empowered to process a pruzbul. Rambam (Shmitah 9: 17) rules that only great sages can write a pruzbul. Shulchan Aruch (C.M. 67: 18) maintains that it has to be a Beis Din Choshuv or an “important court,” of experts in judgment, Sefaradim usually follow that opinion. However, Remoh (ibid.) asserts that it may be arranged by any Beis Din. Commonly this consist of three adult Jewish males who are acceptable witnesses and understand the issues involved in arranging a pruzbul. This is also the opinion of Horav Shlomo Miller Shlit”a and the widespread custom among Ashkenazim.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a